Numerical modeling of reconfigurable THz devices based on graphene nanostructures using autonomous blocks with Floquet channels

摘要

A numerical technique for modeling of devices based on graphene nanostructures at microwave, THz and IR frequency ranges by using rigorous mathematical models to solve the 3D diffraction boundary problems is developed. The models are based on the solution of full set of Maxwell`s equations with electrodynamic boundary conditions simultaneously with a model of the graphene surface conductivity determined from the Kubo formula. Using the computational algorithm based on the decomposition approach by autonomous blocks with Floquet channels (FABs), the scattering parameters of THz polarizers, based on the periodic 2D array of rectangular graphene nanopatches, depending on the frequency and angle of incidence for different values of the chemical potential were calculated for the THz frequency range. The results show that the S-parameters of graphene nanopatch arrays THz devices, tuned by the external bias electric field, can also be controlled by modifying the 2D array geometry and areal density, through changing the periodicity, the size and the configuration of the patches.